Hi Fox, when I click on select all applications and select HX90V the list of available apps shrinks to five which do not include the timelapse app. Sony do not seem to be in any hurry to update their apps. I asked them whether they intended to make the app compatible with the HX90V in the near future and they said "In regards to your enquiry, please note that sadly, we cannot confirm if the camera will be compatible or not; however, once we have any updates, it will be released on the website." Which translates as "sorry mate, no effing idea".
Syncing with a smartphone seems to have become camera-makers' preferred approach to geotagging, so if you're happy with this you'll have a much wider range of cameras to choose from. But it's too fiddly for me and I don't want to drain my phone battery when I'm on long walks, so I only considered cameras that have their own GPS receiver.